Bike Comparison
    Checkpoint ALR 42021 Trek
    Recommended
    MSRP
    $1,699
    Where to Buy
    —
    $1

    At

    Category
    		Gravel
    Weight
    		22.6 lbs
    3.6
    Frame
    		Aluminum
    Fork
    		Carbon
    Wheels
    		Aluminum
    Wheel Size
    		700c
    Clearance
    		45c
    Brakes
    		Hydraulic Disc
    Motor
    Battery
    Groupset
    		GRX 400, GRX 600
    Drivetrain
    		2 × 10
    Brand Site

    trekbikes.com

    Summary
    		The Trek Checkpoint ALR 4 is an aluminum frame gravel bike with mid-range components and hydraulic disc brakes.
    Similar Bikes
    Accessories
    Ride Feel

    Based on frame geometry and build specs.

    Rider Position
    relaxedaggressive
    Terrain
    smoothrugged
    Checkpoint ALR 4
    Other Gravel bikes
    Gear Range

    A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

    Lowest gear

    (climbing)

    36 mph

    Checkpoint ALR 4

    Highest gear

    (descending)

    Spec Level

    Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

    Geometry
    Specs
    Checkpoint ALR 42021 Trek
    Frame

    300 Series Alpha Aluminum, tapered head tube, Control Freak internal routing, 3S chain keeper, rack and fender mounts, flat mount disc, horizontal sliding dropouts, 142x12mm thru axle

    BB Standard: BB86/BB92, Press Fit

    Tire Clearance: 45c

    Colors: Rage Red; Dark Aquatic

    Fork

    Checkpoint carbon, tapered alloy steerer, rack mounts, fender mounts, flat mount disc, 12x100mm thru axle

    Bottom Bracket

    Shimano RS500, 86mm, PressFit

    Headset

    FSA Integrated, sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom

    Stem

    Size: 49, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 80mm length; Size: 52, 54, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length; Size: 56, 58, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 100mm length; Size: 61, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 110mm length

    Handlebar

    Size: 49, Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop, 38cm width; Size: 52, Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop, 40cm width; Size: 54, 56, Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop, 42cm width; Size: 58, 61, Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop, 44cm width

    Saddle

    Bontrager Montrose Comp, steel rails, 138mm width

    Seatpost

    Bontrager Comp, 6061 alloy, 27.2mm, 8mm offset, 330mm length

    Groupset
    Rear Derailleur

    Shimano GRX RX400, long cage, 36T max cog

    Front Derailleur

    Shimano GRX RX400, braze-on

    Crank

    Size: 49, Shimano GRX RX600, 46/30, 165mm length; Size: 52, Shimano GRX RX600, 46/30, 170mm length; Size: 54, 56, Shimano GRX RX600, 46/30, 172.5mm length; Size: 58, 61, Shimano GRX RX600, 46/30, 175mm length

    Shifters

    Shimano GRX RX400, 10 speed

    Cassette

    Shimano Tiagra HG500, 11-34, 10 speed

    Chain

    KMC X10

    Brakes

    Shimano RX400 hydraulic disc, flat mount

    Wheels
    Rims

    Bontrager Tubeless Ready, 28-hole, 17mm width, presta valve

    Spokes

    14g stainless steel

    Front Hub

    Bontrager alloy, sealed bearing, centerlock disc, 100x12mm thru axle

    Rear Hub

    Bontrager alloy, sealed bearing, centerlock disc, Shimano 11-speed freehub, 142x12mm thru axle

    Tires

    Bontrager GR1 Comp, wire bead, 60 tpi, 700x40c

    Disc Rotors

    Shimano SM-RT70, centerlock, 160mm

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